Figure 3. Significant correlations of the severity of RSV infection with early T cell responses (first week of disease). Data were derived from 25 subjects with acute RSV disease. Severity of RSV disease was measured by the duration of hospitalization. RSV-specific CD8+IL-9+ (A) and CD4+IL-22+ (B) were enumerated by flow cytometry and expressed as percentages of the parent CD4+ population. Coefficients of correlations and P values were generated using the Spearman correlation analysis.